561802842 has 24 divisors (see below), whose sum is σ = 1288842516. Its totient is φ = 176251776.

The previous prime is 561802841. The next prime is 561802867. The reversal of 561802842 is 248208165.

It can be written as a sum of positive squares in 2 ways, for example, as 521619921 + 40182921 = 22839^2 + 6339^2 .

It is a junction number, because it is equal to n+sod(n) for n = 561802797 and 561802806.

It is not an unprimeable number, because it can be changed into a prime (561802841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 917673 + ... + 918284.

Almost surely, 2^561802842 is an apocalyptic number.

561802842 is an abundant number, since it is smaller than the sum of its proper divisors (727039674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561802842 is a wasteful number, since it uses less digits than its factorization.

561802842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835982 (or 1835979 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 561802842 is about 23702.3805133577. The cubic root of 561802842 is about 825.1406393844.

The spelling of 561802842 in words is "five hundred sixty-one million, eight hundred two thousand, eight hundred forty-two".